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Finding the Fourth Proportional to 198,658.08, 274,158 and 123,230.88

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Solution

The fourth proportional to 198,658.08, 274,158 and 123,230.88 is: 170,064.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,658.08 : 274,158 = 123,230.88 : x
  2. Step 2: Convert to fraction form
    198,658.08/274,158 = 123,230.88/x
  3. Step 3: Cross multiply
    198,658.08x = 274,158 × 123,230.88
  4. Step 4: Simplify right side
    198,658.08x = 33,784,731,599.04
  5. Step 5: Solve for x
    x = 33,784,731,599.04/198,658.08
  6. Step 6: Final answer
    x = 170,064.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.